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High-inflaming-resistance railway signal cable

A railway signal, high flame retardant technology, used in communication cables, insulated cables, cables, etc., to achieve excellent flame retardant performance, isolation of flame or high temperature penetration, and excellent heat resistance.

Inactive Publication Date: 2015-06-24
江苏通鼎光电科技有限公司
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

However, existing standards such as TB / T 2476-1993 "Railway Signal Cables" and TB / T 3100-2004 "Railway Digital Signal Cables" are formulated for general outdoor railway construction railway signal cables, and are not fully applicable to urban Rail transit construction, and the highest flame retardant grade of railway signal cables can only reach the bundled combustion grade B of GB / T 19380-2008 "Cable and Optical Cable Combustion Test under Flame Conditions"

Method used

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Embodiment Construction

[0018] It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0019] The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0020] A high flame retardant railway signal cable, such as figure 1 As shown, it includes a cable core 3 twisted by several insulated single wires; the outside of the cable core 3 is provided with a first layer of ceramic silicon rubber composite tape 4 and a second layer of ceramic silicon rubber composite tape from the inside to the outside. 9. Aluminum sheath 5, inner sheath 6, double-steel tape armor layer 7, third ceramic silicon rubber composite tape 10 and outer sheath 8; the insulated single wire includes inner conductor 1 and cross-linked polyethylene insulation Layer 2.

[0021] It should be noted that the cable core 3 is not only protected by the inner and outer sheaths, bu...

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Abstract

The invention provides a high-inflaming-resistance railway signal cable. The high-inflaming-resistance railway signal cable comprises cable cores formed by multiple insulation single wires in a twisted mode, and a first ceramic silicon rubber composite tape layer, a second ceramic silicon rubber composite tape layer, an aluminum protection sleeve, an inner protection sleeve, a double-steel-tape armored layer, a third ceramic silicon rubber composite band layer and an outer protection sleeve are arranged outside the cable cores in sequence from inside to outside. The insulation single wires comprise inner conductors and cross-linked polyethylene insulation layers. The cable is wrapped with the ceramic silicon rubber composite tapes two times, the tapes form ceramic shells not prone to falling under the flame condition of 500 DEG C-1300 DEG C or the non-flame condition, flames can be effectively insulated or high-temperature permeation can be effectively insulated, and therefore the inflaming-resistance property is quite good. According to the GB / T 19380-2008 <cable and optical cable combustion test under flame condition>, the grade of bunched combustion can reach the grade A.

Description

technical field [0001] The invention belongs to the technical field of cables, in particular to a high flame-retardant railway signal cable. Background technique [0002] With the acceleration of my country's urbanization process, in order to solve the problem of urban road traffic congestion, China's urban rail transit construction has entered a fast track, mainly based on subways. Due to the relatively closed space of the subway, higher requirements are put forward for fire safety, so the railway signal cables used in the subway have higher requirements on the flame retardant function. At present, there is no relevant unified national or industry standard for railway signal cables used in my country's subways, so various construction units generally implement TB / T 2476-1993 "Railway Signal Cables", TB / T 3100-2004 "Railway Digital Signal Cables" and other railway ministry standard. However, existing standards such as TB / T 2476-1993 "Railway Signal Cables" and TB / T 3100-200...

Claims

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Application Information

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IPC IPC(8): H01B7/295H01B7/02H01B11/00
Inventor 沈小平徐伟
Owner 江苏通鼎光电科技有限公司
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